tests/qemu-iotests/291

   1 #!/usr/bin/env bash
   2 #
   3 # Test qemu-img bitmap handling
   4 #
   5 # Copyright (C) 2018-2020 Red Hat, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 seq="$(basename $0)"
  22 echo "QA output created by $seq"
  23
  24 status=1 # failure is the default!
  25
  26 _cleanup()
  27 {
  28     _cleanup_test_img
  29     nbd_server_stop
  30 }
  31 trap "_cleanup; exit \$status" 0 1 2 3 15
  32
  33 # get standard environment, filters and checks
  34 . ./common.rc
  35 . ./common.filter
  36 . ./common.nbd
  37
  38 _supported_fmt qcow2
  39 _supported_proto file
  40 _supported_os Linux
  41 _require_command QEMU_NBD
  42 # compat=0.10 does not support bitmaps
  43 _unsupported_imgopts 'compat=0.10'
  44
  45 # Filter irrelevant format-specific information from the qemu-img info
  46 # output (we only want the bitmaps, basically)
  47 _filter_irrelevant_img_info()
  48 {
  49     grep -v -e 'compat' -e 'compression type' -e 'data file' -e 'extended l2' \
  50             -e 'lazy refcounts' -e 'refcount bits'
  51 }
  52
  53 echo
  54 echo "=== Initial image setup ==="
  55 echo
  56
  57 # Create backing image with one bitmap
  58 TEST_IMG="$TEST_IMG.base" _make_test_img 10M
  59 $QEMU_IMG bitmap --add -f $IMGFMT "$TEST_IMG.base" b0
  60 $QEMU_IO -c 'w 3M 1M' -f $IMGFMT "$TEST_IMG.base" | _filter_qemu_io
  61
  62 # Create initial image and populate two bitmaps: one active, one inactive.
  63 ORIG_IMG=$TEST_IMG
  64 TEST_IMG=$TEST_IMG.orig
  65 _make_test_img -b "$ORIG_IMG.base" -F $IMGFMT 10M
  66 $QEMU_IO -c 'w 0 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  67 $QEMU_IMG bitmap --add -g 512k -f $IMGFMT "$TEST_IMG" b1
  68 $QEMU_IMG bitmap --add --disable -f $IMGFMT "$TEST_IMG" b2
  69 $QEMU_IO -c 'w 3M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  70 $QEMU_IMG bitmap --clear -f $IMGFMT "$TEST_IMG" b1
  71 $QEMU_IO -c 'w 1M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  72 $QEMU_IMG bitmap --disable -f $IMGFMT "$TEST_IMG" b1
  73 $QEMU_IMG bitmap --enable -f $IMGFMT "$TEST_IMG" b2
  74 $QEMU_IO -c 'w 2M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  75
  76 echo
  77 echo "=== Bitmap preservation not possible to non-qcow2 ==="
  78 echo
  79
  80 TEST_IMG=$ORIG_IMG
  81 $QEMU_IMG convert --bitmaps -O raw "$TEST_IMG.orig" "$TEST_IMG" &&
  82     echo "unexpected success"
  83
  84 echo
  85 echo "=== Convert with bitmap preservation ==="
  86 echo
  87
  88 # Only bitmaps from the active layer are copied
  89 $QEMU_IMG convert --bitmaps -O qcow2 "$TEST_IMG.orig" "$TEST_IMG"
  90 _img_info --format-specific | _filter_irrelevant_img_info
  91 # But we can also merge in bitmaps from other layers.  This test is a bit
  92 # contrived to cover more code paths, in reality, you could merge directly
  93 # into b0 without going through tmp
  94 $QEMU_IMG bitmap --add --disable -f $IMGFMT "$TEST_IMG" b0
  95 $QEMU_IMG bitmap --add --merge b0 -b "$TEST_IMG.base" -F $IMGFMT \
  96      -f $IMGFMT "$TEST_IMG" tmp
  97 $QEMU_IMG bitmap --merge tmp -f $IMGFMT "$TEST_IMG" b0
  98 $QEMU_IMG bitmap --remove --image-opts \
  99     driver=$IMGFMT,file.driver=file,file.filename="$TEST_IMG" tmp
 100 _img_info --format-specific | _filter_irrelevant_img_info
 101
 102 echo
 103 echo "=== Merge from top layer into backing image ==="
 104 echo
 105
 106 $QEMU_IMG rebase -u -F qcow2 -b "$TEST_IMG.base" "$TEST_IMG"
 107 $QEMU_IMG bitmap --add --merge b2 -b "$TEST_IMG" -F $IMGFMT \
 108      -f $IMGFMT "$TEST_IMG.base" b3
 109 _img_info --format-specific --backing-chain | _filter_irrelevant_img_info
 110
 111 echo
 112 echo "=== Check bitmap contents ==="
 113 echo
 114
 115 # x-dirty-bitmap is a hack for reading bitmaps; it abuses block status to
 116 # report "data":false for portions of the bitmap which are set
 117 IMG="driver=nbd,server.type=unix,server.path=$nbd_unix_socket"
 118 nbd_server_start_unix_socket -r -f qcow2 \
 119     -B b0 -B b1 -B b2 -B b3 "$TEST_IMG"
 120 $QEMU_IMG map --output=json --image-opts \
 121     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b0" | _filter_qemu_img_map
 122 $QEMU_IMG map --output=json --image-opts \
 123     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b1" | _filter_qemu_img_map
 124 $QEMU_IMG map --output=json --image-opts \
 125     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b2" | _filter_qemu_img_map
 126 $QEMU_IMG map --output=json --image-opts \
 127     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b3" | _filter_qemu_img_map
 128
 129 nbd_server_stop
 130
 131 # success, all done
 132 echo '*** done'
 133 rm -f $seq.full
 134 status=0